Friction-clutch.



P. EVANS.: FRIGTION CLUTCH. APPLICATION r'fLnn Rov.1. 1907.

Patented Nv.23, 1909.

I. EVANS.

rmcxoN CLUTCH.

l APPLICATION FILED NOV, 1. 19h07. 940,679, Patented Nav. 23, 1909. s SHEETS-SHEET 2.

P. EVANS.,

FRIGTION CLUTCH. l APPLICATION FILED Nov'. 1. 1907..

Patented Nov. 23, 1909.

3 SHEETS-SHEET 3.

Unifrnn sfia'riis in! freind orifice.

POWELL EVANS, or PHILADELPHIA, PENNSYLVANIA.

Fnic'ifIoNcLUrcH.

Specification of Letters Patent.

Application filed November l, 1987. Serial No. 400,253.

vide af friction clutch in which certain ot the I operating 'parts hitherto inade of cast or wrought i'netal. shall be so constructed as to permit of `their being,^ formed ot pressed inet-al with the idea of lighteningand cheapeniinc:f the construction.

' .lt s further desired to provide a Afriction clutch having the ahove noted characteristics and employing a plurality ot frietionally eigng g plates, in which said plates While f. nnss isin'the na'lities refuisite for ermitting` die proper slipping and engagement of -their surfaces shall he less costly than has heretofore been considered vpossible.

These 'hhyffs and other znlvantageous ends .l securmasgd iiuat'tcr set lorth, reference heii'igilrad to n. accompanying drawings, in which :e v i 4, v

Eiguie l, iS a .'ertieal seetion'o my iniprovedlcliiteli, illustrating the detail arrangement ot its parte; Fig'. 2, is a vertical section oitl'lic clutch in Fig. l, taken on the tine 2N2 .of said ligure; Fig. El, is a detached .perspcgtive 'View ot enit clutch; VFigs. l and 5, are respectively a ain parts ofthe fragmentary vertical section and a plan ol one. modification ol in v invention; Fig. (3, is n fragmentary vertical section of a :wond n'mditication ol niy invention; Fig. 7, is an enlarged vertical section illustratingv the preferred construction ot the friction plates used in'iny clutch; Fig. 8, is a perspective view otone of the sections which are ein- `ployedin the construction illustrated in Figs. 4 and', and Fig. i), is a fragmentary vertical section ot' a slightly inoditied torni' of the construction shown in Fig. Ll.

In the,v above drawings, A represent-s a shaft driven from any suitable source ot powei'ntid having a llan'ge av tnovided with i ai'i'i'adjustable nut whose outer surface is beveledloi'inclined. To ythe end ot this shaft is keyed or otherwise fixed a substantially rammen Nov. 23, 1909.

| cylindrical structure B on Whose outer sur lines substantially parallel to the shaftA.

The ease for the clutch is illustrated at C siste of a ring forming part of or attached structure.

upon an inwardly flanged coller D.

elongated depressions and the inwardlyexf tending portions or ribs #resulting troni these tit into transversely extending recesses of the case. I drum a series of internally projecting ribs annuler plates e2 Within seid drum. .As

wardly toward lthe ribs' Z1 of the structure B and there are mounted second series of plates so formedthat are notched so as to receive the ribs o Whereby they are connected to the structure B and tornate with one another and each plate has ribs.

For gether in order to couple the members Iof stoel, having a series ofnotchesff lformed in its outer edge for iioibrotatahly holding it i. the eiidinost ofthe plates @fand has itspoi- ,ativcly deep annular cup which -projects l under a part ot the cylindrical*structure 3B.

and as shown is provided with a flange v; riveted or bolted to a ineinher C `to be, driven, which in the present instance eoii-v to the web of a pulley, fly' Wheel or similar..l

#Said case C is of a. generally. cylindrical forni and vis preferably .made of, a single sheet of pressed steel. I Its endropposite that having the flange @fis extended Y. y or flanged inwardly and has riveted to it a .flange el of a mit d adjustably threaded,

e of 'a drun'i-lilie structure E Vso as to 'pref vent the saine from rotating independently l These recesses form-inside the'4 1 e', which, as shown in the figures, enter snit'v able notches in the peripheries .of :i series of l shown in. Fig. l, these platescxtend iii-i a circular, pressed out ribo angular section v so that the plates engage eachother only upon the inner and'out-er suracesofthese l ressing the two sets of plates to-y the clutch, I provide afplateF- of pressed" in the drum E. This plato 'is so shaped to engage the apex of the circular rib es of face is formed a series of ribs b extending in y in the cylindrical surface of the case C are'l` pressed or otherwise formed a number of y r upon, this latter a b their cuter edges clear the ribs c of the drinn structure E, While their inner edges' the shaft A. so as to be compelled to turn'A therewith. The plates of these' two sets altion j" adjacent to the shaft A; with which itis concentric so torined to: provide a relvplaced to beu-engaged by lever of the well known form.

bronze or othersuitable rings-or sleeves a3; A spring g is confined between the bottom of the cup shaped portion of the plate F and the inwardly extending iange Z2 of the threaded sleeve I) so as to continually tend to press said plate into engagement with the endmost of the disks e2 and consequently to:

press all of the disks to ether to rictionally couple the members of t e clutch.

h which engages tif-shoulder on said sleeve,

andV ball bearings hf 'which act against a nut 71,2 screwed upon the end of said sleeve and' retained inposition in vany desired manner. Uponvthe sleeve H are vprojecting lugs h3 l With. the various parts shown'in Fig; 1, it will be seen that the spring g so acts'upon tlieplate F as to force the plates b and ,c2 into frictional engagement with each other and'so couple the members of the clutch. If,

however, by means of a suitable operating lever inen'gagement witlithe lugs 71,3, the

' beveledsleeve H is so 'shifted that the nut L It will be understood` that tlie drum E,

while'preferably 'constructed by pressing the rbs'e in a cylindrical section of steel tub A ing or in a flat strip which yis afterward struction shown in Fig. 9 I depend en-V..

curved into shape, may, iii/desired, be constructed as shown in Figs. 4 and 5. In such case such drum would be divided up into a number of segmental sections ejoining each other along lines parallel to the shaft A and held to the case C by rivets e* whichv pref'- erably pass tlirough'holes formed half in one section and half in the'adjacent section. In the case shown in F igs.- 4' and 5 the rib e of each section of the drum is engaged by an interior rib 02 of the case C, while in the 'condrical surface and mount the plates e directly on these ribs. iIn such case the spring pressedr plate F, while engaging one of the a clutch-operating.

said spring -releasethe plates of the two series `tional'engagement with each other.

ribs e2 as 'above noted,will have its periphery so notched as to permit it to fit over the ribs c'and tum with the case.

Under ordinary conditions, clutches of the type to which my invention` belongs' are preferably made with their plates e2 of steel and engaging actions between the various sets of plates, asis required in the coupling and uncoupling ofv` the clutch. Such cony `struction is, however, prohibitory under An internallybeveled collar or sleeve H isv many conditions on account of lthe cost of the bronze plates..v .In order therefore toreduce the expense of this construction while obtaining the desired results, I lformI both sets of plates b and e2 of steel but provide the plates b', which are coupled tothe struc- .and their plates b" of; bronze or other maf terial which will permit the proper slipping ture' B," with coatings b* and b5 on their engaging faces, which coatings are formed 'of bronze or other suitable material as found best under practical conditions. These coat-- ings may be. electrolytically deposited or otherwise applied as desired, butinasmuch y as they are so attached tothe faces of the plates b as to be practically integral therewith, it will be seen 'that I attain byy them allof the-advantages resultingffrom solid bronze plates.,

I claim:

- l. The' combination of a substantially f cylindrical casing ,ofpressed metal having a seriesof inwardly pressed portions forming'l i in teriorribs, a shaft substantially axially central ofsaid cylindrical ca s'inga ribbed structure within thewcasing on `said shaflnaV series of plates notched'v to receive the ribs `of said structure and mounted thereon, a `second series of plates alternatingwith those of the rst series Aand operatively connected to the interior of the rlbs of the casing., a v spring plate constructed to beheld fromro tating by satidinterior. ribs of. the casingya.

spring adjustable between said lcasing, and',

late, with means for moving' the spring p ate to compress the s ring and 2. The, combination-in a clutch of a casing .au internally ribbed drum mounted within and non-rotatably held to the casing, a series c ci"A annular plates notched to receivef'the ribs, 'of the drum and mounted within the same,-

a substantiall cylindrical structure also pro- 4 vided with ri s, a second series of plates al ternating with those of the first series'and notched' to receive the ribs ofsaid cylindrical y 3.- Thecombinat-ion in a clutch f-a.' casing,

a drum within the casing provided with lon-' gitudinally extending recesses forming-intei-ier ribs and rigidly held to the casingga series of plates notched to receive thiribsj'lSO torsztid hattet-series ot' plates, t plate notched y to engage the rihs ot the drum and placed to engage the end platte ot the series. a Iprtng operative between the easing and `nid hitter plate for (musing the members ot' the one end an inwardly extending flange and elntoh to he coupled, with meann t'or Com-- pressing said Inprlng and releasing-l the eliitt'h members.

-t. The combination in u clutch ot a easing'. a drtun within the casing provided with longitudinally extending reeessesiiforming iuterior ribs, there being pressed portions on the easing extending. into lsaid reeesse-n` :i series of platel notched to receive the. rihs ot the drum` :t second series ot plates also untehed and alternating `with the plates otthe first serien, :t ribbed :supporting strueturttor said latter series` ot plates, a platte notched to engage the rihs of the drum :1nd placed to engage the end platte of the series` a spring operative between the raining and said latter plnte for causing the members ol' the. clutch to be coupled, with means tor compressing said springr and releasing the clutch members.

5. The combination ot' a Shaft having en it n ribbed supporting structure, n series ot plates mounted thereon and notched to reteive the rihnl of Said structure, :in internally rihhed structure having notched plates tittinr itsl ribs and alternating with the plates ot Said first series, a springl plate plaeed to engage the endmost platte, a nut. extending;` around the shaft and adjustnhly'threaded into the end of the `qtructure having the Yinwafdl)y e\t'endrn;

hatt plaeed het'ti'een the` nnt and the Spring platt'. with mean`i for moving the Spring ribs` :t lnpring around the.v

plate against the attion nt the lqpring to unt-ouple the clutch members.

ti. The tomhtnutton of :l suhstnntntlly cyltndrtetl easing ntf prez ed metall. having at- :it tht` other end :un "outwardly extending llanne. said easing lta\in. Y a series ot inwardly pressed portion` forming' interior ribs` a rihhed nupporting truuture Within the ense. :t series ot plutes notched to re vein thel rilot' lH'ueh strut-ture and mounted thereon` a seeond Vwres ot' plates alternating with tho t nl' ilie'tirstvnt-,ries and .operatively t'oiiuet-ted tn the interior rihs of the ense, n pring plate eonstrneted to he held from ro- (ating hy the interior rihs of the case, Said spring plate being of pressed metal and formed with n portion extending under the plate supporting' strnoture. u springentering aid portion ntl the spr/inf; plate', a Structure allzu-hed to' the inwnit/l'ly projecting flange. o lE the vase und engaging the other end of the sprinfr` with nieann jt'or moving; the spring plute tn eoutpre v the spring nud release the plates otE the two Serin` from frietionnl en- 

